Kindness is an inner desire that makes us want to do good things even if we do not get anything in return. It is the joy of our life to do them. When we do good things from this inner desire, there is kindness in everything we think, say, want and do.
Emanuel Swedenborg

No act of kindness, no matter how small, is ever wasted.
Aesop

Don’t be reckless with other people’s hearts, and don’t put up with people that are reckless with yours.
Mary Schmich